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Online literature contains the most current information available.
PEM® self-clinching studs are installed by placing them in properly sized holes in the sheets and squeezing into place with any standard press. The squeezing action embeds the head of the stud into the sheet. The metal displaced by the head flows smoothly and evenly around the ribs and into the annular groove – creating a flushhead assembly and securely locking the stud into the sheet with high torque-out and pushout resistances.

FH (flush-head) studs are available in aluminum, steel, or stainless steel . They are also available unthreaded on special order.
  • Flush-head for sheet thickness of .040” and greater.
  • Type FH is recommended for use in steel or aluminum sheets HRB (Rockwell “B” Scale) 80 or less and HB (Hardness Brinell) 150 or less.
  • Type FHS is recommended for use in steel or aluminum sheets HRB (Rockwell “B” Scale) 70 or less and HB (Hardness Brinell) 125 or less.
  • Type FHA is recommended for use in aluminum sheets HRB (Rockwell “B” Scale) 50 or less and HB (Hardness Brinell) 82 or less.
Unit of Measure

Pin Dia. Code

N/A 281

Length Code

N/A 8

Min. Sheet Thickness

N/A .093 in

Hole Size in Sheet + .003 - .000

N/A .312 in
P - Nominal Pin Diameter ± .0021
N/A .281 in a1380.jpg

L - Length ± .015

N/A .500 in

H ± .015

N/A .380 in
S Max.2 N/A .160 in

Min. Dist. Hole C/L to Edge

N/A .38 in

For Use in Sheet Hardness

N/A HRB 80 / HB 150 or less

Fastener Material

N/A Heat-Treated Carbon Steel

Optional Finish

N/A Zinc plated per ASTM B633, SC1 (5µm), Type II, yellow

CAD Supplier

N/A PennEngineering® (PEM®)
  • 1 Other pin diameters can be specified.
  • 2 Pin diameter may exceed max. in this region.